I have two questions on projects in areas that are seismic regions D or more restrictive and flood prone/high water table:
NFPA 13 (2016) Section 220.127.116.11 where clearance is provided by a pipe sleeve, 4 in. pipe & larger require 4 in. larger pipe sleeve. So if we are providing a below grade wall or floor penetration, that experiences high water tables and flooding.
What are the most common practices to prevent ground water intrusion through the pipe sleeve?
NFPA 13 Section 18.104.22.168 states - where required, the clearance shall be filled with flexible material that is compatible with the piping material. Is this most likely a water proofing or rated caulk?
My original thoughts lead me to something like a Metraflex Sliding MetraSeal or any pipe sleeve seal on the market, but think that would go against the internal pipe sleeve clearance requirements. Any suggestions on best practices?
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